Art of dust-handling.



W. W. WOODLEY. ART OF DUST HANDLING.

APPMGATION FILED APR.15.1911.

. L, 'upon the more less, of small sirioy proportioned t'elocity is lewered, and furthere introduction of new volumes of inte the piping' further reacts fan by increasing the resistance Witt the added Weight ot the incoming ina el '.ihiislit will readily be seen that ctor @if tune enters materially into n, and 'that the entire system, a" must essentially he iigtaking care of the Worst v -at may ne encountered in the operation of the plant. Also, it will be 1 the fast multiplying diliiculties upon lengthening` the bloW-dis tance pats a fiery short liinit upon the distance 'over wliicn the material can be conveyed 1x/'ith anything lise satisfactoryr serv- .ice and reasonable expense. l have found the incre that such miscellaneous inatei may kept iii irl-ass torni, the less likely are tte ditierently-characterized particles trav ai? such widely dill'erent s as to cause andne accumulations in naigc pipe while in transit; and turnave ciind, that the elect of deliverr Yellaiieous material at the end discharge pipe in relatively closely c ncentrated mass terni with a relatively small Jolinne of air is to keep the Volume of [ine dust inclosed Within the coarsei ving of material, to such a degree iat in "a stances the use ot the lector may he dispensed within ihodying my invention. Further, ing; the material in suoli massed a small air volume, the terminal loyed. may he M4Jery `riper than 'would be reft il Jeins to handle the saine :uno out a large Volume of air. Fn: that hy using' post olowcr, the materials con- :c tlircii"` tively sinall pipe, oi i rea the -.ieieiice to niat 7 i, regardless o," or time moment oi: the con'- ife ance. Thus, l am not only enabled to reduce the sine of the pipingf and the terminal (li-.ist collector (it one be used), but hy rdiicing the rolinnc of nir handled, 'l ani enabled te cnt down the power to a inii'iiinimi so economizingr in every factor of tl i nein, and 'v-.istlu 'tending practical er casiole range ot oijieratlon.

lli; c'cneral inf niethod comeni'olates the ...Y l. einpn ol' blow pijnng lor blows or troni e hundred ac two thousand :l v

terminalconstant volume air current generator. Into the pipe, l introduce'ielatively concentrated chai-ges ol iniscellanewis mater al at such time intervals as 'to`-piodi ice initial separation oil the charges in the piping, each instant Acharge being introduced at siicli tii'ne interval after its predecessor that the preceding charge has moved a considerable distance along the pipe loe/fore the instant charge enters. fit the discharge end of the pipe, l provide means for reducing the velocity el the material, and deli'qering it l gently,-that is, at low velocity substantially 'free from air blast effect.

In the drawing.Il wherein l have shown a structnre for the practice of my invention, particularly adapted for a wood-Working establishment, Figure l is a diagram of the system; 2 is a side elevzetion of the charger with parts breken away; and Fig. 3

.L is a plan view o' ie charger.

5 indicates dust collector which as far as this intentioii'1 is concerned constitutes simply a reservoir for niiscelleneous material.

6 indicates a salve oy 'which the material inay be thrown at will into a local discharge 'pipe 7, or into a feed pipe S, for deii'ery into the long blow system.

9 :indicates in general a charger for ircceiving relatively compact charges el iniscellaneons material from the feed pipe 8, and delivering such material in charges at timed intervals into the blowpipe 1U.

ll indicates a positive blower for forcing air in substantially constant volume into the receiving end 10 of the hier@ pipe toi' delivery through the charger into the long discharge i'uniO of said blow pipe.

l2 indicates the terminal dust colectcr of Well lznown construction, Which in niaiiy instances is employed to facilitate proper -'elirery ef the dust, hut generically said terminal dust collector may he regarded as' merely an'enlarged chaniser 'for reducing the inaterialsfvelocity' an" permitting the escape ci? air, for in niaiiy instances the terl in. l.

l dust collector may oe onii'tte and the piping arranged to discharge merely into emerged chamber in which the material may settle and whence the air may escape.

Each of the principal structures shown,

except the charger 9, is, per se, a thing well known upon the niai'i'et, and needs no specilic description. 0f course, the specific construction of the charger may ce varied,

but for the handling of miscellaneous niateiial from ii'codfiiforling plants, its struetiire should he such that ay receive and deliver Wide; iaiit l- *al n'itheiit clogs and Without suhst air leakage. specific tion shown provides two heads 'let and l5 arranged transversely te the axes of pipes 8 end it?? die pipe 8 opening through en aperture in the head li, and the delifery and discharge ends l0' and ll the blow pipe l0 opening through registering apertures in heads isi and l5. The shaft 1G extending axially through the heads li and l5, carries in rotation end platesl` li and l, accurately itting against the heads l and l5, e. d connected by lengthwise tubesl l?7 prei'- ernbly so arranged that euch time one tube l? is brought into register with the pipe 8, another isters with the pipe 1G.' The shaft i@ may be positively rotated intermittently or continuously, gearing 1S typiying any .suitable driving means. It will loe understood that the drive ofthe shaft lo is so timed that tubes 17, successively lilled while registering with the pipe 3, are pre'` sented et successive time inte reis in register with'tlie @ipe l0, and manifestly the constent-uelocizy air current 13o-.. seid sweeis said charges succe sively out erger tubes 'into the long discharge of so delivering materiel in charges 'into ine with appreciable inter' charges, is to create ir e spaces coniperetively e between the charges, such g' into which slower tr= onally retarded particles, gre

)are *ed from vhe nein r may travel es ere radii? rely te neer automatically augmenting pressure, but, ecceierat'ed by the inereese pressure, suol. eipient masses merely break or somewhat after the fashion of r .ing` on a beech, such breakers )l dissi themselves in the presence of this n Aconstant air velocity which thus -Al whole mass traveling in an almost even layer, and with, es :t whole close-to-unierm velocity.y to the ultimate point 'of delivery7 All of the factors et smell/r air, delivery of the material in concentrated `charges into the piping', uniformity of travel, and automatic augmentation of pressure in the piping wherever e, inassing tendency occurs, contribute to the effect of keep` `ing the lighter end heavier materials particles from separatingr find that et the delivery eudof charge pipe, the. heavier ticles are so intermingled and ere so Auni-l formly delivered that there is eeniperetiielj' little tendency for the lighter dust pair-tiel i ll),-

Volume or the leeg dis* and lighter par- 3b te scatter, they being carried in mass hy the heavier particles, se that tiere is inucn less fine dust to li'seliznfge ene f in the old syste i.

cepteole without s f undue dissemination et ere e termin-el lus c' treted relie qiii t o he handled, i. @tien of materiel therein.v

ive easy senaretienn he foregoing descriptiorl5 l seine extent 'e resse `l my theories er ceases end eil'ects of actions e -f ich iney er in? the iniil under or stratifying, and

here ieund it ness-ibis and While l. have herein described in considerable detail a construction for the embodiment of my invention, it Will be inderstood that l do not desire to be limitedcthereto, as

many changes he made in the physical devices for the :practice ofiny invention, as

dened in the appended claims.

l/lhat l claim is:

l. The method of handling miscellaneous materials-consisting of particles and bodies of Widely variant specific gravity, size, shape, and surface conditions, such as Wood-powder, sawdust, chips, blocks, and long; shavings-inu long-blow pneumatic systems, which consists in creating in a long, relatively small pipe, an air current of constant volume 'and variable pressure, and delivering the miscellaneous material into the blow pipe under the influence of said air current in separated relatively-concentrated masses with appreciable intervals between, thereby to alord spaces or the lagging of retarded material Without reducing the velocity of the materials-content of the piping as a Whole, and to deliver the material at' the end of the blow pipe in a relatively concentrated stream.

Q. The method of handling miscellaneous materials in long blow pneun'iatic systems, which consists in creating in a long blow pipe of small cross sectional area an air current of constant volume, charging the pipe with relatively concentrated masses of miscellaneous material wherein the particles 'of various qualities are interminglcd, and initially spacing the masses apart in the pir` to afford spaces for the lagging of retarded particles of each mass Without re-` dncing the velocity of the materialscontent of the piping;` as a Whole.

8. The method of handlingthrough a long relatively small pipe, heterogeneous materials, such as Wood working mill refuse, some particles ol which, in air-impelled passage through the pipe, tend to lag behind others deposited therewith, which consists in delivering into said pipe., under the influence of' an air current of substantially constant volume and variable pressure, a relatively concentrated mass of such ma terial, allowing a lapse of time before the delivery of another such relatively concentrated mass of material, and thereafter delivering, another such relatively concentrated mass, and so on, each said lapse ot time leaving behind each delivered concentrated mass a space in the'pipe in Which the lagging particles of said mass may travel without substantial vclogging effect, and which at the end ol' its ra verse of the long pipe shall. have become occupied by the lagging particles, for delivery from the end of the pipe of said material-initially .in which spaces the lagging partie o' means-s delivered reto in concentrated separated masses-nsily in a relatively concentrated stream of substantially unbroken, character. ll. The method ot eiliecting long-blow transportation oi miscellaneous materials, such as Woodworking-mill refuse, which consists in setting up, in a Ablow-pipe 5G0- feet or upward in length and ot relatively small diameter, proportioned to the volume of material to be handled, an air current ell i constant volume and oit' pressure varyingivith changes of resistance, providing and maintaining a store of the miscellaneous' material in a confined area under atmospheric pressure, trapping bodies or charges out of said material store, each independ ently of the other and each Without coimnnnication o the blow-pipe pressure to the material store -or to the other trapped bodies, and delivering the trapped, relatively concentrated charges into the air current in the blois7 pipe at spaced intervals, leaving in the blow pipe after each charge a space substantially free from material in Vwhich space the lagging particles ofthe niiscel" laneons material may travel wi stantial clogging e'ect.

5. The method oli eiecting` 4img-blow transportation and delivery ot miscellaneous materials, such as Wood-ivorlcmill refuse, as described, which consists in setting up, in a blow-pipe 560 feet or more in length `and of relatively small diameter, proportioned to the volume of material to be handled, an air current of constant vol unie and variable pressure, varying with c changes of. resistance in the blow-pipe; n"100 vidinff' and constantly maintaining: a s in of miscellaneous material in a reco-p 1free from 'the blow pipe pressure, trap bodies or charges ont of said 'store oy ity into compartments under atmo pressure; transferring said charges s at intervals, in their coni'ining com; ments, into the air stream of the lilovv leaving in the bloviY pipe after 'each ch a space substantially free from mater miscellaneous materials may travel Witho snbstantialhv inipeding the rate of flow the materials-contents or the blowpipe avvhole, for delivery of the material from 115 the end of the pipe in a relatively concentrated .streamv of substantially unbroken character, and receiving said delivered nim terial in a settling receptacle. f1 l in testimony whereof l hereunto hand in the presence of tivo Witnesses.

ivrirrronn W. fvvoontnr. lin the presence oi- ,'lNo. Hannan, 1M. MARTIN.

set my 12e 

